Process for dyeing or coloring cellulose esters and cellulose ethers



Patented Jan. 21, 1936 'PUNITED STATES PATENTIOFFICE PROCESS FOR DYEING R COLORING CELLULOSE ESTERS AND CELLULOSE ETHERS Franz Ackermann, Binningen, near Basel, Switzerland, assignor to the firm of Society 01' Chemical Industry in Basle, Basel, Switzerland No Drawing. Application May 16, 1932, Serial No. 611,758. In Switzerland May 23, 1931 9Claims.

wherein H2 represents the two hydrogen atoms o! the methylene group capable 'of reaction. In the products of the above mentioned formula the 25 double linkage, which does not belong to a qulnoid system, plays the part of the main chromophore.

This invention is based on the discovery that these products, which quite generally correspond to the general formula 45 valuable which contain a basic group such as an NH: group or an N (alkyl): group. Among these compounds those in turn are especiallyivaluable in which .the residue R2 above defined is the residue of an aromatic amino aldehyde. -l leverthe- 50 less it will be clear; from thedescription and from the table that useful results are-obtained with practically any cyclic aldehyde;ketone or nitroso compound.

The following examples illustrate the invention, 65 the parts being by weight:--- p The products dye Example 1 0.5 part of the condensation product from 1- (2'-chloro)-phenyl-3-methyl-5-pyrazolone and paradimethylaminobenzaldehyde (which'may ad: vantageously be obtained by heating the components in dilute hydrochloric acid) is brought into a fine state of sub-division, for example by .dissolving it in alcohol, pouring the solution into water, filtering and triturating the residue with 10 sulfite cellulose waste liquor or' Turkey red oil, and is then introduced into about 3000 parts of water in which have been dissolved 6 parts of soap. 100 parts of acetate silk are entered at V about 40 C., the temperature is raised to 75-80 C. and dyeing is continued for to 1 hour at this temperature. The material is then rinsed, brightened and dried in the usual manner. The acetate silk is dyed vivid strongly reddish yellow shades.

If the condensation product used in this example is used as a yellow component in the, production of mixed shades, for example grey, the dyeings obtained are not phototropic.

Example 2 0.5 part of the condensation product from cyanacetic acid ethyl ester and paradimethylaminobenzaldehyde, which has been brought into a state of fine sub-division, for example by dissolving it in alcohol, pouring into water, filtering and triturating the residue with sulfite cellulose waste liquor or Turkey red oil, is introduced into about 3000 parts of water in which 6 parts of soap have been dissolved. 100 parts of acetate silk are entered at about 40 0., the temperature is raised to 75-80 C. and dyeing is continued for to 1 hour at this temperature. The material is then rinsed, brightened and dried in the usual manner. The acetate silk is dyed vivid pure greenish yellow shades.

Similar dyeings are obtained by using instead of cyanacetic acid ethyl ester another ester of cyanacetic acid, such as the methyl, isopropyl or butyl ester, and by using instead of para-dimethylaminobenzaldehyde, paradimethylaminobenzaldehyde or 2 chloro-4-dimethylaminobenzaldehyde.

Instead of dimethylaminobenzaldehyde there may obviously be used dipropyl-, or diamylaminobenzaldehyde. may also be used.

iixample 3 An acetate silk fabric is printed with a printing color containing per litre 20 grams of the con-.

Mono-alkylaminobenzaldehydes 5o V densation product from cyanacetic acid and paradimethylaminobenzaldehyde- (which may be ob-' tained by saponifying the condensation product referred to' in the first paragraph of Example 2), 40 grams of glycerine, 240 grams of water and 700 grams ot a gum thickening consisting of 50 per cent. of gum arabic and 50 per cent. of water. The material is then dried, steamed for 1 hour under an over-pressure of V atmosphere and finished in the usual manner. The printed portions of the fabric are dyed pure greenish yellow.

Ermple 4 parts of Glauber salt. The acetate silk is dyed I,

beautiful-pure greenish yellow.

Acetate silk may be dyed in a similar manner by using instead of the sulfuric acid 8 parts .0!

- acetic acid of 84 per cent. strength.

The manner of working described in this example is also suitable for those products whose salts are colored.

Example Theproeedure is as described in the first paragraph of Example 1, with the exception that instead of the condensation product thereinnamed there is used the. condensation product from para-nitrosodimethylaniline and l-phenyl-3-methyl-5rpyrazolone. The acetate silk is dyed a beautiful violet Bordeaux.

The following table illustrates the shades which can be obtained by means of some of the condensation products used in the present invention.

' Color on acetate Compound containing a reactive methylene group Aldehyde or nitroso compound 13:81::

1 Para-diethylaminobenzaldehyde Yellow. 2 Para-dlmethylammobenzaldehyde. Do. 3 Para-mtrosodlmethylaniline Orange. 4 Para-dimethylamiuobenzaldehyde Do. 5 Para-nitrosodimethylanilme Red. 6 Para-dimetbflamincbenzaldehyde- Oran 7 Para-nitrosodimethylaniline Violet. 8 Para-dimethylaminobenzaldebyd Orange. 9 Ortho-chloro-para-dimethyl-amino- Do.

benzaldehyde. 10 Para-dimetbylammobenzaldehyde- Greenish-yellow, ll Ortbo chloro paradimethylamine Do.

benzaldehyde. l2 Para-mtrosodrmeth laniline 13 Bonzaldehyde l4 Nitrosodimethylaniline l5 2chloro+dlmethylamino- -nitrosobenzene. 16 2-hydroxy-4-dimethylamino-l-nitroso- Do.

. benzene. 17 Do Para-nitrobenzaldehyde Yellow. 1 Do Ortho-chlorobenzaldehyde-. Do.

. 1 D Para-nitrobenzaldehyde.---- Do. 20 Do. .Furiurol. .a Do. 21 d-amino-hydroxythionaphthene Benzalgiehyde; Orange. 22 5-methylhydroxythionaphthene.-..- Para-mtrosodimethylaniilne.---..---.. Red-violet 23 5-chioro-7-methyl-hydroxythionaph-- Do. Violet ene 24 Dimothylaminobenzal-acetone Para-dimethylaminobenzaldehyde Orange. 2 o Ortho-chiorobenzaldehyde Do. 26 Para-nitrirbenzaldebydeuu Do. 27 Cinnamaidehyde Red-orange 28 Para-nitrosod1ethylani1ine.. 0 29 Terephthalaldeh de Yellow. 30 Para dimethy obenzaldehnfiie Do.

(after condensation with ammo 31 Para dimethylaminobenzaidehyde Do.

(after )condensation with ethanolamme 32 Do Para dimethylaminobenzaldehyde Orange.

(alter )condensation with diethylamine 33 Do Para-dimethyleminobenzaldebyde Yellow.

(ztielr gondensatlon with monoethyla e 34 Oyanacetio acid aniiide Para-dimethylan inobenzaldehyde-... Do. 35 .Cyanaoetio acid monohydfln Do. 36 Oyanaggtic acid-para-dimethylaminodo Do.

37 Oyanaoetio acid ethyl ester Product of coupling dizaotimd para- Red.

an inobenzaldehyde and dimethylaniline. 38 1-phenyl-3-methyl-5-py olooo do Do. 39 Do Benzaidebyde Orange. 40 Do ortho chlorobenzaldehyde Do. 41 D Piper n l Do. 42 Do Oinnamaldehyde--. Do. 43 Do Pera-aminobenzaldehyde Do. 44 3-metl1yl-5- yrazolone Para-dimethylaminobenzal Do. 45 1-(metia-amfno)-phenyl-3-methyl-5-py- I do Do.

razo one. 46 l-(para-chloro)-phenyl-3-methyl-5-py- Para-diethylaminobenzaldehyds Do.

raz one. 47 1-gamete-amino)pienyl-fi-pyrazolone- Para-dimethylaminobenzaldehyde. Yellow-red.

-car xy a 48 1-(ortho-chloro)-phenyl-3-methyl-5- Product of coupling diazotized para- Do.

pyrazolone. aminobenzaldehyde and dimethylaniline. 49 Do---.; Product 0! coupling diazotized para- Orange.

. aminobenzaldehyde and aniline. 50 l-phenyl-5-pyramlone-3-carboxylic ac- Benzaldehyde Do.

d ethyl ester 51 Do. Para-dimethylaminobenzaldehyde Yellow-red. 62 i-lrydroxynaph do 53 Amfnnhn. Inn (in Yellow. 54 Methoxyaoetophen do Greenish-yellow.

acetate sllk or in nitrocellulose varnish m m m c d g fig fmz Aldehyde or nltzoeo compound Golden-yellow. Greenish-yellow. Orange.

Yellow.

Do. Bright blue-red.

Brownorange.

The dyestuffs Nos. 1, 6, 14, 20, 26, 2'7, 29, 39, 41, 30 56, 57, 67, 70, and 73 have the following formulas:--

o 5 0 4 4 5 m m N e n w A 4 S OW \C O 0 0 0 0 "W m c v w m m m m m w m N N n C 0 CH0 OHC S N(CH;):

0-05: What I claim is ON CH=$ 1. A process for dyeing or coloring cellulose esters or cellulose ethers, consisting in dyeing or coloring the material by means of a colored product which can be obtained by condensing an aromatic para-dialkylamino-aldehyde with ali- .phatic compounds containing a reactive methylene group, the double linkage thus formed playingthe part of the main-chromophore.

2. A process for dyeing or coloring cellulose esters or cellulose ethers, consisting in dyeing or coloring the material by means of a colored product which can be obtained by condensing such a para-dialkylaminobenzaldehyde whose alkyl group contains not more than two carbon atoms with an aliphatic compound containing a reactive methylene group, the double linkage thus formed playing the part of the main chromophore.

3. A process for dyeing or coloring cellulose esters or cellulose ethers, consisting in dyeing or coloring the material by means of a colored product which can be obtained by condensing such a para-dialkylaminobenzaldehyde whose alkyl group contains not more than two carbon atoms with an aliphatic ester of cyanacetic acid, the double linkage thus formed playing the part of the main chromophore.

4. A process for dyeing or coloring cellulose esters or cellulose ethers, consisting in dyeing or coloring the material by means of a colored prodnot of the general formula R1=CHR2 wherein R1 stands for any residue of a compound containing an aliphatically bound reactive methylene group, and R2 for any aryl residue.

5. A process for dyeing or coloring cellulose esters or cellulose ethers, consisting in dyeing or coloring the material by means of a colored product which can be obtained by condensing an aromatic aldehyde with compounds containing an aliphatically bound reactive methylene group.

6. A process for dyeing or coloring cellulose esters or cellulose ethers, consisting in dyeing on coloring the material by means ot a colored prodnot which can be obtained by condensing an aromatic amino aldehyde with compounds containing an aliphatically bound reactive methylene roup.

'7. A process for dyeing or coloring cellulose esters or cellulose ethers, consisting in dyeing orcoloring the material by means of a colored product which can be obtained by condensing an aromatic para-dialkylamino-aldehyde with compounds containing an aliphatically bound reactive methylene group.

8. A process for dyeing or coloring cellulose esters or cellulose ethers, consisting in dyeing or coloring the material by means of a colored product which can be obtained by condensing an aromatic para-dialkylamino-aldehyde whose alkyl groups contain not more than two carbon FRANZ ACKERMANN. 

